CN106044824A - Method for treating yellow calcium nitrate liquid - Google Patents
Method for treating yellow calcium nitrate liquid Download PDFInfo
- Publication number
- CN106044824A CN106044824A CN201610586071.3A CN201610586071A CN106044824A CN 106044824 A CN106044824 A CN 106044824A CN 201610586071 A CN201610586071 A CN 201610586071A CN 106044824 A CN106044824 A CN 106044824A
- Authority
- CN
- China
- Prior art keywords
- calcium nitrate
- nitrate liquid
- yellow
- liquid
- phosphoric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/36—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C5/00—Fertilisers containing other nitrates
- C05C5/04—Fertilisers containing other nitrates containing calcium nitrate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for treating yellow calcium nitrate liquid. The method has the advantages that the yellow calcium nitrate liquid is generated mainly due to high-content soluble iron ions in calcium nitrate liquid, the method mainly includes carrying out precipitation reaction on phosphoric acid and the iron ions in the yellow calcium nitrate liquid, accordingly, the pH (potential of hydrogen) of the calcium nitrate liquid can be lowered, the iron ion removal rate can reach 50-99% after the yellow calcium nitrate liquid is filtered, and yellowing phenomena of the calcium nitrate liquid can be reduced.
Description
Technical field
The invention belongs to fertilizer field, be specifically related to a kind of method processing yellow calcium nitrate liquid.
Background technology
Calcium ammonium nitrate is also called agricultural calcium ammonium nitrate in fertilizer Register of the Ministry of Agriculture, and molecular formula is 5Ca (NO3)2·
NH4NO3·10H2O.Producing at present calcium ammonium nitrate uses most common method to be cordierite (main calcium carbonate) and nitric acid dissolves instead
Should, generate calcium nitrate, neutralize with Calx, regulate its pH value and filter to 6-7, join ammonium nitrate in proportion, concentrate pelletize, obtain nitric acid
Ammonium calcium product.
End produces the calcium nitrate liquid of yellow before manufacture is to affect the main cause that calcium ammonium nitrate product is partially yellow, and causes calcium nitrate
Liquid be yellow be owing to raw materials for production bring the reason of iron ion into.General iron ion precipitates the most completely when pH=4, but produces nitre
Acid ammonium calcium uses Calx regulation calcium nitrate liquid pH to have hysteresis quality, and mixing time is too short, and calcium nitrate liquid is often made after transhipment filter pressing
PH is become to raise, even greater than 8.But being experimentally confirmed, pH regulator is to during more than 8, and it is multiple that iron ion may change into soluble iron
Compound, and making calcium nitrate pressing filtering liquid is yellow so that the calcium ammonium nitrate product of subsequent granulation, also in yellow, affects product appearance.
Summary of the invention
It is an object of the present invention to provide a kind of method processing yellow calcium nitrate liquid, solve in calcium nitrate liquid owing to iron ion is deposited
Causing in yellow, the problem affecting product appearance.
The technical scheme is that a kind of method processing yellow calcium nitrate liquid, add phosphoric acid to yellow calcium nitrate liquid
In, stand more than 1h after stirring, filter, obtain achromaticity and clarification calcium nitrate liquid.
Further, described yellow calcium nitrate liquid is: in calcium ammonium nitrate produces, by the dissolving of calcium carbonate Yu industrial nitric acid
Reactant liquor, filters the yellow calcium nitrate filtrate of generation after being excessively neutralized to pH ＞ 8 with Calx.
Further, add phosphoric acid and yellow calcium nitrate liquid pH is reduced to less than 7.
Further, the phosphoric acid of use is industrial phosphoric acid or other rank phosphoric acid.
In the present invention, add phosphoric acid, phosphate anion and iron ion generation precipitation, on the other hand, reduce calcium nitrate
The pH value of liquid, it is simple to precipitation of iron ions.
The present invention compared with prior art has the advantage that
1, the present invention utilizes the precipitation that in phosphoric acid, phosphate radical produces with iron ion, additionally, dropped by phosphatizing
The pH of low target calcium nitrate liquid, filtration treatment liquid, water white transparency calcium nitrate liquid can be obtained, produce after joining ammonium nitrate concentrating by proportion of production
Meet the white calcium ammonium nitrate product of production requirement.
2, the present invention utilizes the precipitation that in phosphoric acid, phosphate radical produces with iron ion, calcium ion loss amount ＜ 2%, ferrum
Ion remaval rate reaches 50-99%.
Detailed description of the invention
The present invention utilizes the precipitation that in phosphoric acid, phosphate radical produces with iron ion, additionally, reduced by phosphatizing
The pH of yellow calcium nitrate liquid.
The technical scheme is that a kind of method processing yellow calcium nitrate liquid, add phosphoric acid to yellow calcium nitrate liquid
In, phosphate anion and iron ion generation precipitation, on the other hand reduce calcium nitrate liquid pH, filtrate achromaticity and clarification, can change
The phenomenon that kind calcium nitrate liquid is partially yellow.
Wherein, yellow calcium nitrate liquid is, uses Calx excessively to neutralize by calcium carbonate and industry nitre in calcium ammonium nitrate produces
Acid dissolve reactant liquor to the mixed liquor of pH ＞ 8, or its filter after the yellow calcium nitrate filtrate that obtains；
Table 1: yellow calcium nitrate liquid calcium, iron ion content in the present invention
| Title | Calcium ion content | Iron ion content |
| Yellow calcium nitrate liquid | 18.50-19.80% | 0-0.1% |
Wherein, add phosphoric acid in yellow calcium nitrate liquid, yellow calcium nitrate liquid pH is reduced to less than 7, agitation as appropriate,
Stand more than 1h, filter, calcium ion in filtrate and iron ion are analyzed, contrast with the content before reaction.
Embodiment 1
Taking the yellow calcium nitrate liquid produced after filter pressing in production, this calcium liquid is alkalescence, adds phosphoric acid to yellow calcium nitrate
In liquid, regulate its pH to less than 7, agitation as appropriate, stand 4h, filter, be designated as filtrate 1.Concrete analysis data such as table 2,
Table 2: analysis result before and after reaction
| Title | Calcium ion content | Iron ion content | pH |
| Yellow calcium nitrate liquid | 13.29% | 0.024% | 8.71 |
| Filtrate 1 | 12.65% | 0.002% | 6.95 |
In the present embodiment, using phosphoric acid to process yellow calcium nitrate liquid, its iron ion removing rate is more than 95%, and filtrate 1 is
Achromaticity and clarification liquid, though additionally, calcium ion content reduces 0.64%, but do not affect production.
Embodiment described above only have expressed the detailed description of the invention of the application, and it describes more concrete and detailed, but also
Therefore the restriction to the application protection domain can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, on the premise of conceiving without departing from technical scheme, it is also possible to make some deformation and improvement, these broadly fall into this
The protection domain of application.
Claims (4)
1. the method processing yellow calcium nitrate liquid, it is characterised in that in interpolation phosphoric acid to yellow calcium nitrate liquid, quiet after stirring
Put more than 1h, filter, obtain achromaticity and clarification calcium nitrate liquid.
A kind of method processing yellow calcium nitrate liquid the most according to claim 1, it is characterised in that described yellow calcium nitrate
Liquid is: in calcium ammonium nitrate produces, by the dissolving reactant liquor of calcium carbonate Yu industrial nitric acid, after being excessively neutralized to pH ＞ 8 with Calx
Filter the yellow calcium nitrate filtrate produced.
A kind of method processing yellow calcium nitrate liquid the most according to claim 1, it is characterised in that add phosphoric acid by yellow
Calcium nitrate liquid pH is reduced to less than 7.
A kind of method processing yellow calcium nitrate liquid the most according to claim 1, it is characterised in that the phosphoric acid of use is work
Industry phosphoric acid or analytical pure phosphoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610586071.3A CN106044824A (en) | 2016-07-25 | 2016-07-25 | Method for treating yellow calcium nitrate liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610586071.3A CN106044824A (en) | 2016-07-25 | 2016-07-25 | Method for treating yellow calcium nitrate liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106044824A true CN106044824A (en) | 2016-10-26 |
Family
ID=57418658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610586071.3A Pending CN106044824A (en) | 2016-07-25 | 2016-07-25 | Method for treating yellow calcium nitrate liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106044824A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193213A (en) * | 2013-04-24 | 2013-07-10 | 胡雷 | Method for comprehensively utilizing low-grade phosphate ores |
| CN104531991A (en) * | 2014-12-23 | 2015-04-22 | 中南大学 | Low-grade copper ore bioleaching solution treatment method |
-
2016
- 2016-07-25 CN CN201610586071.3A patent/CN106044824A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103193213A (en) * | 2013-04-24 | 2013-07-10 | 胡雷 | Method for comprehensively utilizing low-grade phosphate ores |
| CN104531991A (en) * | 2014-12-23 | 2015-04-22 | 中南大学 | Low-grade copper ore bioleaching solution treatment method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161026 |